单项选择题

A．Oil shortage.
B．Large population.
C．Air pollution.
D．A large-scale war.
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单项选择题
A．By making use of special paper.B．By adding common salt to silver.C．By making the temporary image.D．By using a special piece of metal.
A．By making use of special paper.
B．By adding common salt to silver.
C．By making the temporary image.
D．By using a special piece of metal.
单项选择题
A．Ask if he can drive the car.B．Repair the seats.C．Offer to buy the car.D．Look for a better deal.
A．Ask if he can drive the car.
B．Repair the seats.
C．Offer to buy the car.
D．Look for a better deal.
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